Find the least positive values of x

7.a] Find the least positive values of x such that
i) 71 โ‰ก ๐‘ฅ(๐‘š๐‘œ๐‘‘8)
ii) 78 + ๐‘ฅ โ‰ก 3(๐‘š๐‘œ๐‘‘5)
iii) 89 โ‰ก (๐‘ฅ + 3)(๐‘š๐‘œ๐‘‘4)

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